The OBD2 code P0062 is associated with the “HO2S Heater Control Circuit Bank 2 Sensor 3,” signaling an issue in the heater circuit of the downstream oxygen sensor on Bank 2. This sensor is crucial for monitoring exhaust gases and ensuring optimal combustion by adjusting the fuel mixture based on oxygen levels.
A malfunction in the heater circuit can lead to inaccurate sensor readings, which might trigger the malfunction indicator lamp (MIL) and potentially affect engine performance and emissions control.
P0062 quick overview
| Meaning | P0062: HO2S Heater Control Circuit Bank 2 Sensor 3 |
| Is it serious? | Yes, as it can affect fuel efficiency and emissions, and may lead to other engine performance issues. |
| Possible causes | – Damaged or corroded wiring and connectors – Faulty oxygen sensor heater – Problems with the Engine Control Module (ECM) or Powertrain Control Module (PCM) – Poor electrical connections or grounding issues |
| How to diagnose? | Check for proper power and ground at the oxygen sensor connector. Verify continuity of the heater circuit in the wiring harness. Inspect the ECM (or PCM) for any issues that could affect oxygen sensor heater control. Test for excessive resistance in the heater circuit to ensure it’s within the manufacturer’s specifications. |
P0062 Meaning
When your vehicle shows a P0062 code, it’s alerting you to a problem with the heating element of an oxygen sensor located in Bank 2, Sensor 3. This heater helps the sensor quickly reach its optimal working temperature, crucial for accurate exhaust gas monitoring.
If this circuit isn’t working properly, the sensor may not function efficiently, leading to possible increases in fuel consumption and emissions. The issue often involves electrical faults, such as damaged wires, poor connections, or problems with the car’s computer that controls the sensor. Fixing it typically requires checking and repairing these electrical components.
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How to fix P0062 – learn from mechanics
I looked into P0062 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Toyota P0062
Vehicle information 2017 Toyota Tacoma 4.0L V6
Issue + repair history
- MIL lamp illuminated with code P0062
- Replaced Bank 2 Sensor 3 (downstream oxygen sensor)
- Checked wiring harness for damage or corrosion
- Code P0062 persisted after sensor replacement
Other OBD2 Codes + Test Results
- P0062: HO2S Heater Control Circuit B2S3
- No other codes reported
- Live data showed stable oxygen sensor voltage during operation
Mechanic suggestions
- Check for proper power and ground at the sensor connector
- Verify continuity of heater circuit in the wiring harness
- Inspect ECM (Engine Control Module) for faults related to oxygen sensor heater control
- Test for excessive resistance in the heater circuit using a multimeter
Final fix
- Discovered corroded terminal at the ECM connector for Bank 2 Sensor 3
- Cleaned and repaired terminal, cleared codes, and reset ECM, resolving the issue
Case #2: Ford P0062
Vehicle information 2016 Ford F-150 5.0L V8
Issue + repair history
- MIL lamp illuminated with code P0062
- Replaced Bank 2 Sensor 3 (downstream oxygen sensor)
- Inspected wiring harness for damage or corrosion
- Code P0062 persisted after sensor replacement
Other OBD2 Codes + Test Results
- P0062: HO2S Heater Control Circuit B2S3
- No other codes reported
- Live data showed stable oxygen sensor voltage during operation
Mechanic suggestions
- Check for proper power and ground at the sensor connector
- Verify continuity of heater circuit in the wiring harness
- Inspect PCM (Powertrain Control Module) for faults related to oxygen sensor heater control
- Test for excessive resistance in the heater circuit using a multimeter
Final fix
- Discovered damaged wiring at the oxygen sensor connector
- Repaired wiring, cleared codes, and reset PCM, resolving the issue
Case #3: Chevrolet P0062
Vehicle information 2018 Chevrolet Camaro 3.6L V6
Issue + repair history
- MIL lamp illuminated with code P0062
- Replaced Bank 2 Sensor 3 (downstream oxygen sensor)
- Checked wiring harness for damage or corrosion
- Code P0062 persisted after sensor replacement
Other OBD2 Codes + Test Results
- P0062: HO2S Heater Control Circuit B2S3
- No other codes reported
- Live data showed stable oxygen sensor voltage during operation
Mechanic suggestions
- Check for proper power and ground at the sensor connector
- Verify continuity of heater circuit in the wiring harness
- Inspect ECM (Engine Control Module) for faults related to oxygen sensor heater control
- Test for excessive resistance in the heater circuit using a multimeter
Final fix
- Discovered damaged wiring at the oxygen sensor connector
- Repaired wiring, cleared codes, and reset ECM, resolving the issue
How to diagnose P0062
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Explanation |
|---|---|
| Check for proper power and ground | Ensure the oxygen sensor’s electrical connections receive the necessary voltage and have a good ground. |
| Verify continuity of the heater circuit | Test the electrical pathway of the heater circuit for breaks or shorts with a multimeter. |
| Inspect the ECM or PCM | Look for potential issues in the vehicle’s computer system that could impair sensor heater operation. |
| Test for excessive resistance | Measure the circuit’s resistance to verify it matches the specifications set by the vehicle manufacturer. |
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)